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Finding the Fourth Proportional to 215.50, 297.51 and 150.09

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Solution

The fourth proportional to 215.50, 297.51 and 150.09 is: 207.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.50 : 297.51 = 150.09 : x
  2. Step 2: Convert to fraction form
    215.50/297.51 = 150.09/x
  3. Step 3: Cross multiply
    215.50x = 297.51 × 150.09
  4. Step 4: Simplify right side
    215.50x = 44,653.28
  5. Step 5: Solve for x
    x = 44,653.28/215.50
  6. Step 6: Final answer
    x = 207.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.